正则表达式(系统)

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第三方库正则表达式:用法http://see.xidian.edu.cn/cpp/html/1435.html

//邮箱验证

- (BOOL)isValidateEmail:(NSString *)email

{

NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";

NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES%@",emailRegex];

return [emailTest evaluateWithObject:email];

}



//用户名

- (BOOL)validateUserName:(NSString *)name

{

NSString *userNameRegex = @"^[A-Za-z0-9]{6,20}+$";

NSPredicate *userNamePredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",userNameRegex];

BOOL B = [userNamePredicate evaluateWithObject:name];

return B;

}



//昵称

- (BOOL)validateNickname:(NSString *)nickname

{

NSString *nicknameRegex = @"^[/u4e00-/u9fa5]{4,8}$";

NSPredicate *passWordPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",nicknameRegex];

return [passWordPredicate evaluateWithObject:nickname];

}



//密码

-(BOOL)validatePassword:(NSString *)passWord

{

NSString *passWordRegex = @"^[a-zA-Z0-9]{6,20}+$";

NSPredicate *passWordPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",passWordRegex];

return [passWordPredicate evaluateWithObject:passWord];

}



//身份证号

- (BOOL)validateIdentityCard:(NSString *)identityCard

{

BOOL flag;

if (identityCard.length <= 0) {

flag = NO;

return flag;

}

NSString *regex2 = @"^(//d{14}|//d{17})(//d|[xX])$";

NSPredicate *identityCardPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex2];

return [identityCardPredicate evaluateWithObject:identityCard];

}



//手机号码验证

- (BOOL)validateMobile:(NSString *)mobile

{

//手机号以13 1518开头,八个 /d 数字字符

NSString *phoneRegex = @"^((13[0-9])|(15[^4,//D])|(18[0,0-9]))//d{8}$";

NSPredicate *phoneTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",phoneRegex];

return [phoneTest evaluateWithObject:mobile];

}



//车牌号验证

- (BOOL)validateCarNo:(NSString *)carNo

{

NSString *carRegex = @"^[/u4e00-/u9fa5]{1}[a-zA-Z]{1}[a-zA-Z_0-9]{4}[a-zA-Z_0-9_/u4e00-/u9fa5]$";

NSPredicate *carTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",carRegex];

NSLog(@"carTest is %@",carTest);

return [carTest evaluateWithObject:carNo];

}


//车型

- (BOOL)validateCarType:(NSString *)CarType

{

NSString *CarTypeRegex = @"^[/u4E00-/u9FFF]+$";

NSPredicate *carTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",CarTypeRegex];

return [carTest evaluateWithObject:CarType];

}



//网址

- (BOOL)validateUrlString:(NSString *)urlString

{

NSString *urlStringRegex = @"^([a-zA-Z]+://)?([\w-\.]+)(\.[a-zA-Z0-9]+)(:\d{0,5})?/?([\w-/]*)\.?([a-zA-Z]*)\??(([\w-]*=[\w%]*&?)*)$";

NSPredicate *urlStringPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",urlStringRegex];

return [urlStringPredicate evaluateWithObject:urlString];

}



1.利用NSPredicate(谓词)匹配

例如匹配有效邮箱:

NSString *email = @“nijino_saki@163.com”;

NSString *regex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];

BOOLisValid = [predicate evaluateWithObject:email];

谓词匹配比较灵活,但是需要有谓词的相关知识。


2.利用rangeOfStringoption:直接查找


NSString *searchText = @"// Do any additional setup after loading the view,typically from a nib.";

NSRange range = [searchText rangeOfString:@"(?:[^,])*\\." options:NSRegularExpressionSearch];

if (range.location != NSNotFound) {

NSLog(@"%@",[searchText substringWithRange:range]);

}

options中设定NSRegularExpressionSearch就是表示利用正则表达式匹配,会返回第一个匹配结果的位置。


3.使用正则表达式类


NSString *searchText = @"// Do any additional setup after loading the view,typically from a nib.";

NSError *error = NULL;

NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"(?:[^,])*\\." options:NSRegularExpressionCaseInsensitive error:&error];

NSTextCheckingResult *result = [regex firstMatchInString:searchText options:0 range:NSMakeRange(0,[searchText length])];

if (result) {

NSLog(@"%@\n",[searchText substringWithRange:result.range]);

}

使用系统的正则表达式类(NSRegularExpression)会返回匹配的多个结果。



\[(\S*?)\]

#define FACE_ICON_NAME \[(\S*?)\]

原文链接:https://www.f2er.com/regex/361717.html

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